KR100898956B1 - Optical Recording Medium and Recording Apparatus - Google Patents

Abstract

The optical recording medium has, on its track, a plurality of data block areas and a linking area composed of pseudo data inserted between the data block areas. Each of the data block areas has a configuration in which main data of a block serving as an error correction unit for main data is added and main data identification data is added to each main data piece obtained by dividing the main data of the block by a predetermined number. Have The recording patterns of adjacent pseudo data are different between tracks. A recording apparatus for forming a data block area and a linking area on a recording medium is also described.

Optical recording media, error correction, recorders, track

Description

Optical recording medium and recording device {Optical Recording Medium and Recording Apparatus}

1 is a block diagram showing the configuration of a recording apparatus to which the present invention is applied.

FIG. 2 is a block diagram showing the configuration of a random number generator in the apparatus of FIG.

3 shows a data structure of one ECC block.

4 is a diagram showing the data structure of a recording signal for one sector.

5 shows a linking region between ECC blocks.

6 is a view showing the position of the linking area of each track.

7 is a view showing the positions of linking regions adjacent between tracks.

8 shows a linking area including address data between ECC blocks. 9 is a block diagram showing another configuration of the recording apparatus to which the present invention is applied.

Fig. 10 is a block diagram showing another configuration of the recording apparatus to which the present invention is applied.

Fig. 11 is a block diagram showing another configuration of the recording apparatus to which the present invention is applied.

The present invention relates to an optical recording medium and a recording apparatus and method for forming the recording medium.

In a writable optical recording medium such as a DVD-R or a DVD-RW, new information data may be written after a position where writing has already been performed, and a link region is formed at the junction. In the link area, synchronization data for reading information data in the subsequent data area is written.

However, the formation of the link area in the writable recording medium has a problem of incompatibility in the recording format with a non-writable reproduction-only recording medium such as a DVD-ROM.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical recording medium for reproduction only and a recording apparatus thereof, which can be compatible with a recordable optical recording medium and a recording format.

The optical recording medium of the present invention is an optical recording medium in which data is pre-recorded on a track, each having main data for a block serving as a unit of error correction for the main data, and dividing the main data for the block into a predetermined number. A plurality of data block areas having a configuration in which main data identification data is added to each main data piece, and a linking area by pseudo data inserted between the plurality of data block areas are provided on the track. The recording patterns of adjacent pseudo data are different from each other.

The recording apparatus of the present invention is a recording apparatus for recording data on a track of an optical recording medium, each of which has main data for a block serving as an error correction unit for the main data and a predetermined number of main data for the block. Main data recording means for forming on the track a plurality of data block areas having a configuration to which main data identification data is added for each main data piece divided into the data; and a linking area by pseudo data between the plurality of data block areas. And linking data recording means inserted into the track, wherein the linking data recording means forms a recording pattern of the pseudo data adjacent between the tracks in a different pattern.

The recording method of the present invention is a recording method for recording data on a track of an optical recording medium, each of which has main data for a block serving as a unit of error correction for the main data, and a predetermined number of main data for the block are recorded. A plurality of data block areas having a structure to which main data identification data is added for each main data piece divided into a plurality of data block areas; and a linking area by pseudo data is inserted into the tracks between the plurality of data block areas. And recording patterns of the pseudo data adjacent to each other between the tracks are formed in different patterns.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

1 shows a disk recording apparatus according to the present invention. This recording apparatus is, for example, a device for recording information on a recording disk 1 for a DVD-ROM, and includes a master clock generator 11, a PLL circuit 12, a recording signal generator circuit 13, and an optical modulator 14 ), A recording actuator 15, a spindle motor 16, a servo controller 17, and a main controller 18.

The master clock generator 11 generates a master clock signal and supplies the master clock signal to the PLL circuit 12 and the servo controller 17. The servo controller 17 is supplied with a master clock signal and a frequency signal FG indicating the rotational frequency from the spindle motor 16. The servo controller 17 performs rotation control, that is, spindle servo control of the spindle motor 16 so that the frequency signal FG is synchronized with the master clock signal.

The PLL circuit 12 generates a write clock signal based on the master clock signal. The recording signal generator 13 includes a data generator 20 for outputting information data (main data) to be recorded and address data corresponding to the information data, and an error correction code (ECC) block based on the information data and address data. An ECC blocking circuit 21 for outputting as suitable sector data, a random number generator 22 for generating random number data for the linking area, a timing circuit 23 for generating a timing signal for every 1 ECC block in accordance with a write clock signal, A switching circuit 23 for switching and outputting the information data and the random number data of the ECC block according to the timing signal, a modulator 25 for performing 8-16 modulation on the data output from the switching circuit 24, and A synchronization adder circuit 26 for adding a synchronization code containing 14T synchronization data to the data to form a recording signal is provided. The main controller 18 controls each unit 20 to 26 in the write signal generation circuit 13 in synchronization with the output clock of the PLL circuit 12.

The optical modulator 14 modulates the laser light according to the recording signal from the recording signal generating circuit 13, and supplies the modulated laser light to the recording actuator 15. The recording actuator 15 performs exposure by irradiating a laser beam to the recording portion of the recording disc 1 rotated by the spindle motor 16.

The random number generator 22 is composed of a memory 31, eleven D flip-flop circuits 32 to 42, and one adder 44, as shown in FIG. The memory 31 stores an initial value of 11 bits in advance and outputs it to the D flip-flop circuits 32 to 42 in response to a command from the main controller 18 at the start of recording to the master 1. Each of the D flip-flop circuits 32 to 42 has a preset input, and each corresponding bit of the initial value from the memory 31 is supplied to the preset input. Each of the D flip-flop circuits 32 to 42 outputs one bit of data supplied to the input D from the output Q in response to a clock. These D flip-flop circuits 32 to 42 are connected in a link by sandwiching the adder 44. That is, the adder 44 is connected between the flip-flop circuits 32 and 33, and the output Q of the flip-flop circuit 42 is connected to the input D of the adder 44 and the flip-flop circuit 42.

The adder 44 adds data from the output Q of each of the flip-flop circuits 32 and 42 to supply it to the input D of the flip-flop circuit 33. The 8-bit linking area data is output from the output Q of the D flip-flop circuits 35 to 42. The linking area data is pseudo data of the information data section.

Next, the operation of the disc recording apparatus according to the present invention having such a configuration will be described.

Based on the information data and address data to be recorded, the ECC block circuit 21 sequentially creates and outputs 91-byte data pieces.

In the DVD format, one ECC block is composed of 16 sectors, as shown in FIG. Each sector has a data structure consisting of 13 rows x 182 bytes. Since one data piece is formed every 91 bytes of each row, each row constitutes two data pieces (91 bytes x 2).

The data piece is supplied to the modulator 25 through the switching circuit 24, and after 8-16 modulation is performed, the synchronization portion is supplied to the circuit 26. The synchronization adding circuit 26 adds a synchronization code (32 bits) including a 14T synchronization pattern to 182 bytes (1456 bits) of data after modulation to form a recording signal. The sync code is any one of the eight codes SY0 to SY7, and is identification data that makes it possible to identify a data position in a sector.

Fig. 4 shows the data structure of the recording signal for one sector. The synchronization codes SY0 to SY7 are located in front of the data piece after modulation, and two sets of synchronization codes and data pieces are arranged in one line.

On the other hand, in the random number generator 22, the initial value is output from the memory 31 to the eleven D flip-flop circuits 32 to 42 at the start of recording. Each of the D flip-flop circuits 32 to 42 outputs the value of the corresponding bit of the initial value. The output values of the D flip-flop circuits 35 to 42 serve as linking area data. Thereafter, whenever the clock is supplied, the output value of the D flip-flop circuit or adder 44 connected to the input side is read and output as 8-bit (1 byte) linking area data. A clock is supplied to the clock terminals C of the D flip-flop circuits 32 to 42, for example, for each linking area, and the linking area data is updated for each clock by an adding operation by the adder 44. The linking area data is pseudo data of the data piece, which is 91 bytes. In one linking area, 91 x 2 bytes of linking area data is generated.

The switching circuit 24 performs the switching operation in response to the timing signal after relaying the data pieces for one ECC block from the ECC clocking circuit 21. As a result, the switching circuit 24 enters a state in which the output data of the random number generator 22 is relayed to the modulator 25. From the random number generator 22, the linking area data is supplied to the modulator 25 through the switching circuit 240, and after the 8-16 modulation is performed, the synchronization part is supplied to the circuit 260. The synchronization part circuit 26 Adds 182 bytes (1456 bits) of linking area data to the linking area data (32 bits) for linking area including 14T sync pattern to form a recording signal. The second sync code is SYY, and the sync codes SYX and SYY have different patterns from those of SY0 to SY7 and indicate the linking area.

The linking area is an area formed between ECC blocks (data block areas) and, as shown in Fig. 5, is composed of two sync frames arranged between the 1ECC block n-1 and the next 1ECC block n.

The recording signal output from the recording signal generating circuit 13 modulates the laser light in the optical modulator 14, and the laser light after the modulation is supplied to the recording actuator 15. The recording actuator 15 performs exposure by irradiating a laser beam to the recording portion of the recording disc 1 rotated by the spindle motor 16.

After the master disc is created from the recording disc 1, an optical disc is obtained by copying and manufacturing with a stamper of the master disc.

In the track of the optical disc, for example, as shown in Fig. 6, a linking area is formed. Moreover, depending on the track, there may be a linking area formed adjacent to each other as shown in FIG. However, as described above, since the linking area data issued from the random number generator 22 as a random number is used, the data patterns of the linking areas of adjacent tracks are different from each other. For example, as shown in Fig. 7, the first pattern, the second pattern, and the third pattern are different from each other in the data pattern of each adjacent linking region.

In order to accurately read the information recorded on the optical disc, tracking control is performed to control the light beam for reading on the recording track. The phase difference method is used for tracking control of a high density optical disc such as a DVD-ROM. In the phase difference method, a tracking error signal indicating an error amount between the irradiation position of the light beam and the recording track is performed in accordance with the difference between the sum signals of the received signals of the relative light receiving sections of the four photodetectors. In the case of the phase difference method, if the correlation between adjacent tracks is strong, the tracking error signal includes a crosstalk component from the adjacent tracks, so that the tracking control becomes unstable. However, when there is an adjacent portion of the linking area between adjacent tracks, as shown in Fig. 7, the data patterns of the linking area are different, so that the correlation of the adjacent tracks can be lowered. Thus, stable tracking control can be achieved even by using the phase difference tracking control.

In addition, the random number generator 22 may use the address data at that time (address data indicating an address of an adjacent data area) as an initial value. That is, as shown by the broken line in Fig. 1, the address data is supplied to the random number generator 22, and each of the D flip-flop circuits 32 to 42 receives address data from the preset input when it becomes the first linking area, for example. To generate linking area data. In addition, a plurality of initial values may be prepared in the memory 31, and any one of the plurality of initial values may be selected according to the address data.

When using the address data as the initial value, the random number generator 22 may record the address data together with the random number linking area data. For example, as shown in Fig. 8, sync codes SYX, SYY, address data and linking area data are arranged in this order in two sync frames of the linking area. If the random number generation pattern of the random number generator 22 with respect to the initial value is known in advance, the linking area data can be used as useful data by reading the address data and the linking area data, and in addition to the relationship between the address data and the linking area data. .

As shown in Fig. 9, the random number generator 22 and the random number generator 28 having the same configuration may be connected in series.

In addition, as the configuration for generating the linking area data, as shown in Fig. 10, a random number generator 22, a scrambled circuit 29, and a memory 30 may be used. The scramble circuit 29 is composed of an EX-OR circuit. In the memory 30, 8-bit data for scramble is written in advance. In the scramble circuit 29, an EX-OR between the linking area data and the scrambled data generated from the random number generator is performed for each linking area, and the final linking area data is used.

Also in the linking area data generating section of FIG. 10, the random number generator 22 and the random number generator 28 may be connected in series similarly to the configuration shown in FIG. 10, address data may be supplied to the random number generator 22, and address data at the start of recording may be used as an initial value.

11 shows another configuration example of the write signal generation circuit 13. In the write signal generation circuit 13 of FIG. 11, the ECC block circuit 21, the modulator 25, the synchronization adder circuit 26, and the switching circuit 24 are connected in this order, and the switching circuit 24 is synchronized. The rear end of the additional circuit 26 is provided. As the data generation configuration for the linking area, a random number generator 22 and a modulator 22a are provided. The linking area data output from the random number generator 22 is supplied to the switching circuit 24 after 8-16 modulation is performed by the modulator 22a. The switching circuit 24 selectively selects one of the data signals of the output data of the synchronization unit circuit 26 and the output data of the modulator 22a in accordance with the timing signal output from the timing circuit 23. To feed. Therefore, no synchronization code is added to the linking area data, and the linking area formed between the ECC blocks on the track of the disc 1 is only the linking area data in the case of pseudo data that does not contain the sync code.

As described above, in the recording apparatus, the linking data recording means forms the recording patterns of the pseudo data adjacent to each other in the tracks in different patterns. In an optical recording medium, recording patterns of pseudo data in adjacent linking areas are different between tracks. Therefore, compatibility with the recording format of the non-writable reproduction-only optical recording medium such as DVD-ROM and the writable optical recording medium such as DVD-RW can be achieved. Accordingly, the configuration of the recording medium player can be simplified.

Claims (14)

In an optical recording medium for reproduction only in which information data has been previously recorded on a track, on the track, A unit block area in which a unit block serving as an error correction unit for the information data is divided and recorded into a plurality of frames to which a sync code is added; And A linking area inserted into a boundary between adjacent unit block areas, divided into two frames each having a sync code of a pattern different from the sync code of the unit block area, and having linking data recorded thereon; The linking data is scrambled, and the recording pattern of the linking data is different between adjacent tracks, And a sync pattern of two sync codes in the linking area is different from each other. The optical recording medium of claim 1, wherein the linking data is scrambled based on address information. The optical recording medium of claim 2, wherein the address information is address information of a unit block area adjacent to the linking area. In an optical recording medium for reproduction only in which information data is recorded in advance in a track, On the track, A unit block area in which a unit block serving as an error correction unit for the information data is divided and recorded into a plurality of frames to which a sync code is added; And A linking area inserted into a boundary between adjacent unit block areas, divided into two frames each having a sync code of a pattern different from the sync code of the unit block area, and having linking data recorded thereon; The linking data recorded in the linking area is a random number generated with different address information as initial values between adjacent tracks, And a sync pattern of two sync codes in the linking area is different from each other. The optical recording medium according to claim 4, wherein the linking data is an exclusive OR value of a data piece issued as a random number generated using address information as an initial value and a predetermined data piece. 5. The optical recording medium of claim 4, wherein the address information is address information of a data block area adjacent to the linking area. In an optical recording medium for reproduction only in which information data is recorded in advance in a track, A unit block serving as an error correction unit for the information data is inserted into a boundary between a unit block area, which is divided into a plurality of frames to which a sync code is added, and the adjacent unit block area, and the unit block area. A linking area in which linking data is recorded, divided into two frames each having a sync code of a pattern different from the sync code of The linking data recorded in the linking area is data shifted bit by using different address information as initial values between adjacent tracks, And a sync pattern of two sync codes in the linking area is different from each other. 8. The optical recording medium according to claim 7, wherein the linking data is an exclusive OR value of a data piece and a predetermined data piece generated by bit shift using address information as an initial value. 8. The optical recording medium of claim 7, wherein the address information is address information of a unit block area adjacent to the linking area. The optical recording medium according to claim 1, wherein the linking area is inserted at every boundary between the adjacent unit block areas. delete delete The optical recording medium according to claim 1, wherein the linking area is provided with a data format in which a sync code is recorded at a position equal to the sync code interval in the unit block area. The optical recording medium according to claim 1, wherein the synchronization code is recorded only at a position at the same interval as the synchronization code interval in the unit block region.

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